400 PRACTICAL BOTANY 



12, Pontederia cordata, a flower of natural size. 



13, Tradescantia Yirginica, flower, outside view ; 13fl^, 

 flower, inside view. 



14, Eriocaulon septangulare, a small plant in flower, 

 natui-al size; l^a, the Lead of flowers magnified; 146, a 

 staminate flower with a tubular, 2-lobed corolla and 3 

 sepals ; 140, a pistillate flower with 2 distinct petals and 

 two sepals ; 14<i, the pistil detached ; all magniiied. 



